It's a fawn, this animal (5)
I believe the answer is:
camel
I believe this clue is a double definition.
'it's a fawn' is the first definition.
(I've seen this before)
'animal' is the second definition.
(I've seen this in other clues)
'this' acts as a link.
(Other definitions for camel that I've seen before include "Old WWI plane" , "Saddle animal in desert regions" , "Yellowish" , "It is called the ship of the desert" , "Desert ruminant" .)